Sewing-machine.



J. P. WEIS.

SEWING MACHINE. APPLICATION rum) 1120.27, 1912.

Patented Nov. 24, 1914.

4 SHBETS-SHEET 1.

7 MM. X-W. HM 3 u v WITNESSES l! INVENTOR BY r; f

ATTORNE' J,.P. WEIS. SEWING MACHINE.

APPLICATION FILED DEC. 27, 1912.

Patented Nov. 24. 1914.

4 SHBBTS-SHEET 2.

WITNESSES J. P. WEIS. SEWING MACHINE. APPLICATION FILED DEC. 27, 1912.

Patented Nov. 24. 1914.

4 SHEETS-SHEET 3.

ATTOR J. P. WEIS.

SEWING MACHINE".

APPLICATION rum one. 27. 1912.

1 1 1 709 Patented Nov. '24, 1914.

4 SHEETS-SHIIET 4 K '4 55 37 39 3B 56% a 7 i 50 ATTORNEY JOHN P. WEIS, OF NYACK, NEW YORK,

ASSIGNOR TO LUClEUS N. LITTAUER, F

GLOVE'RSVILLE, NEW YORK.

SEWING-MACHINE.

Specification of Letters Patent.

Patented Nov. 24., 1914.

Application filed December 27, 1912. Serial No. 738,841.

To all whom it may] concern:

Be it known that I, J OHN P. his, a citizen of the United States, residing at Nyack, in the county of Rockland and State of New York, have invented certain new and useful Imprc ements in Sewing-Machines,

of which the following is a specification.

This invention relates to sewing machines,-

more particularly to the stitching mechanism thereof, the present improvement providing positive means for driving the loopers and needles at high speed with a minimum amount of vibration, whereby very heavy and bulky work may be stitched at a high rate of speed, an object of the in-.

vention being to provide amachine of the long hollow arm type with a rotary :shaft above and a rotary shaft below the work plate with positive connections between. the

two for transmitting power from one shaft to the other, together with means which will insure the passage of the lubricant from one shaft to the other.

Another object of the invention is the provision ofa machine in which nearly all of the moving elements are \operated by rotary driving means, and in. which .the -looper mechanism will be varlable in motion so that a very short throw or movement will accomplish the same results as the long movement heretofore commonly used;

,Another object of the invention is the provision of a machine, in which the looper thread handling means will be located underneath'a cut out portion of the work or bed plate of the machine, with means for protecting the same while affording easy accessibility to the pull-off nipper and takeup devices therefor, and generally, the .provision of an improved organization in which the several parts are peculiarly combined in an improved manner to. provide a ma-. chine adapted to perform the work in a highly, eflicient manner and at a high rate of-speed.

The improved tension mechanism constitutes the. subject-.matterofa divisional case, filed May 29, 1913, Serial No.170,685.

In the drawings accompanying and forming part. ofthis specification, Figure 1 is a front view of this improved machine,

with parts broken away to illustrate the connections between the top and bottom shafts; Fig. 2 is a rear view of Fig 1; Fig. 3 is a top plan view of the mechan smscarried by the base of the machine, with the top or overhanging arm removed; Fig. 4: is a detail sectional view of the looper driving means taken on line 1 of Fig. 1; Fig. 5 is a perspective view of the pull-off nipper and take-up mechanism with the cover swung back; Fig. 6 is a detail view of such cover in its two positions; Fig. 7 is a perspective view of the face plate which carries the neodle thread leader or guard; Fig. 8 is a sectional view of Fig. 7 ,illustrating the oil reservoir and wick for oiling the thread when the machine is used for stitching leather or other heavy material; Fig. 9 is :a, partly sectional end view of the head, the needle bar driving mechanism and presser; foot-lifting means; Fig. 10 is a perspective View of the oil pan used in connection with the splash system of lubrication for the bottom crank or main driving shaft; Fig. 11 is a view of the back looper; Fig. 12 is a perspective view of the two loopers assembled; Fig. 13 is a front view of the front looper;'Fig. 14- is a detail. view of one of the top and bottom shaft connecting rods partly in section; Fig. 15 is a detail ,view of the needle thread tension and tension release looking downward in the direction of the arrow, Fig. 2, the dotted line indicating generally how the tension plate may be swung out of its working position to permit access to the interior of the 'hollow arm; and Fig. 16 is a detail view of a part. of the looper driving means for carrying the loopers to the back and front of the needles.

Similar characters of reference indicate corresponding parts throughout the differ ent figures of the drawings.

This improved machine comprises a base or base plate 1 provided with feet 2 so lo cated as to give a firm support to the machine. This-base 1 is provided with a hearing 3 for the front end of the main driving shaft and bearings 4, for the opposite end thereof. A bushing 6 is secured in the bearing 5 by a set screw 7. Adjustably secured to the base by a set screw 9 is a looper bracket 8, and this bracket is adjustable toward and from the main shaft, being maintaincd in proper alinement by the tongue and groove 10. Carried by this bracket 8 isthe looper shaft 11, which extends transversely to the driving shaft 50 and is reciprocated and. oscillated in suitable bearings of the looper bracket 8. Carried by the looper shaft 11 is the looper driver 12, carrying the looper 13, which is provided with a stem 14 extending into a slot of the looper shaft 11. The looper carrier 12 has a bear-.

Located on the base 1 is a projectingportion 19 provided with a dovetail groove 20 in which operates a slide 21. A gib 22 forms in part the dovetail groove and is secured in position by screws 23. Secured to the slide 21 by meansof a shoulder screw 2r'i is a short arm or member 24: connected with a looper rod 26 by a screw 27 passing through an elongated slot, which thus permits'of end adjustment. A similar adjustable connection '28 at the opposite end of the rod 26 is pivotally secured by a shoulder screw 29 to the looper driver 12. Secured to the slide 21 are two studs 81 (see Fig. 4:) provided with reduced portions 82 on which are freely mounted conical rollers-33, whichare recessed, as at 34, to make them light in weight. These conical rollers engage the beveled edges and36 of the cam. 37 which terminates in a collar 38 'securedto the main shaft 50 by set screws 39. This cam 37 is formed so as to have two dwells andjzwo portions at opposite sides of the centerv of comparatively steep .pitch, so that as the same rotates it gives to the loopers, through the mechanism above described, a movement forward until the dwell portion ofthe cam is reached, at which time the loopers remain in substantially one position until the next portion of the dwell is reached, at which time the loopers move backward to their initial position and again dwell. These movements are repeated at each cycle of the machine. loopersfrom front to rear -of the needles while they are reciprocating is accomplished by means of an eccentric 40 -(see Fig. 16) secured to the main driving shaft 50. This eccentric operates in a yoke 51,

which is mounted on the looper shaft 11 and the reduced portion thereof affords a shoulder, as\at 52, against which the bearing of the yoke 51 abuts. TL, ther end of said bearing is in engagement with a collar 53, whichis held in adjusted position by lock nuts 5 4:. It will be readily understood that this means afi'ords adjustment for the yoke on the shaft 11 and permits the latter to have axial movement therein.

number.

The oscillating movement of the The main driving shaft 51) carries a hand wheel 55 provided with a belt groove 56. This shaft turns freely in the bushing 6 and the bearings 3 and 4. Adjacent to the bushing 6 said shaft is provided with four disks 58 connected by cranks 59, three in in diameter than the disks 58 to, permit the removal of:the'shaft 50.

The machine is provided'ivith the usual feeding mechanism, generally indicated by The bushing 6 is slightly larger 60,having the usual crank disk-61 secured to the shaft 50 by means of a set screw 62. This must be removed from the shaft in order to withdraw said shaft fromthe machine. Heretofore where a disksuch as 61 was used in connection with a plain shaft not having the ofl-set' cranks the shaft was drawn from the machine toward the left 4 andthe disk therefore could be a permanent or fixed part of said shaft, but when said shaft is provided with cranks it is de sira'ble to remove it from the right, ig. 1), and therefore the disk must be removable so that the shaft can be withdrawn from the machine. The base 1 is provided with a rectangular pocket 63, (see Fig. 3), forming with its cover a housing for the cam 37. This pocket or well is filled with a lubricant to keep-the cams and rollers in proper working order and prevent the same from throwing the lubricant from the machine, which is of course damaging to'the goods and disagreeable to the operators, and as cams aremore or less noisy at high speed the walls 64 of the pocket 'act as a'mufiler to deaden the 7 i sound or noise of the parts. Thebase 1 is also'providedwith a housing 65, a (see Fig.

1), opening at the front, as at 66, for access .to the main or; crank shaft and its conhec} the same can be grasped to remove it from the machine. A spring 71"is secured to the drawer by a screw 72 and plate 69*. This spring is curled on each end, as at 73, so as to contact with the Walls of the housing .65,

as shown at 74%,, Fig. 3.- When it is desired to readjust the machine this' oil pan .or drawer may be removed from the machine and thus avoid the spillingof the oilwhen i1 is necessaryto tip the head for any reason. The top of the housing 65 carries a flange 7 5 provided with screw-holes'76, thus affording a seatfor the overhanging arm 77,

(see Figs. 2 and 3), which isalso provided with flanges 7 8 by means of which and suitable screws the head is secured to the housing 65.

.5 any suitable manner.

The upri ght' portion of the arm 7 carries the three rod connections 80, each of which is provided at each end with a suitstrap 81 secured to its rod in Each strap includes a cap 82 secured thereto by screws, and this cap has a-tubular projection 84 which can ries a sponge'or wick 85 that works in the oil carried by the. oil pan 68. The lower and able two-part [0 upper end straps of the connecting rods 80 fit freely on the disk cranks of the lower and upper shafts 50 and 87. The cranks of the upper disks 88 have an angular displacement of 120 degrees relative to each other 15 and are so located relatively to their disks as: to have exactly the same throw as the cranks of the lower shaft 50. The overhanging arm 77 is rovi'ded with a bushing 89 wherein the end of the upper shaft 87 20 rotates, it being held in position by the combined set screws and oil cups 90 and 95,'the latter in en agement with a bushing 9 1: on

-\ the end of th e shaft 87 and has secured to it a crank disk 91, (see Figs' 1 and 9). This 25 crank disk91 is linked to the needle-bar 99,

and this needle bar operates in suitable bearings and has attached thereto at the bottom end a needle chuck 103, in this instance carrying two needles set obliquely so as to make 80 two parallel known two-thread chain stitch. The needles rows of stitching of the well carry threads 106 which extend or pass through the head 104 ofthe machine at 107 nd 108 and are prevented from contacting 3Q ,ith the moving parts located in such head y a U-shaped guard 109, (see Fig. 7), attached to a face plate110, which; is secured to the machine by screws 111. This a shaped guard by rivets and bottom, rounded edge for the threads.

109 is secured to the face plate or solder and is curled at top as at 112, to provide a smooth In order to insert'the )threads in this U-shaped guard one edge is spaced from the plate 110 along the edge 113 and a hook formed wire 114; keeps the threads in the U-shaped guard and prevents the same from jumping out under the rapid motion of the machine. When the face plate 110 is secured to the machine head there is just suilicient space between it and the head of the machine at 115, (see Fig. 1), for the threads to be passed freely into the U'shaped portion. '1 is plate 110 has a circular projection 116 corresponding with a similar one 117, (see Fig. 9), of the machine head, and adjacent to this projec tiontherejmay be a container 118 for oil or other fluids used to moisten the threads, (see Figs. 7 and 8), by means of a wick 120 extending into the fluid receptacle and having its end projecting through a slot 121 in the Ushaped guard in such position that the needle threads 106 will draw over the wick and become moistened. This is very advan tageous-when stitching leather or rubber.

The container maybe filled through an opening 122, (see Fig. 7). j,

The needle threads 106 are guided by an eyelet 123 attached to the top of the needle bar and pass through a leader 125 carried by the overhanging arm, and which acts as a take-up after the needle loops slip from the loopers. Tensions 127 for the needle threads are secured to a swing plate 128, (see Fig. 15), pivotally secured to the top of the arm by means of a shoulder screw 129 having a friction washer inside the head which holds the plate in position. A tension release 180 is pivotally secured to the swing plate 128 by means of a stud and -n-ut 181, so that the release may have axial coacts with a notch 1 10 of the tension release 1 1 11 pivotally secured to the back of the arm by a stud and nut 142. This last or looper thread release is identical with the one on top, and therefore a detailed description of but one is deemed necessary. The lever 136 terminates in an extension 143 carrying a forked projection 144; which cooperates with the foot lifting lever 145. The tension release 141 has a plurality of arms or projections 1416 which pass in between the disks 147 of the tensions to open the same, and

these arms may work in either direction as i the case may require. A plurality of thread apertures 148 in these arms 1 16, which have their ends slightly upturned so that the threads may be easily passed therethrough, lead the looper threads 149 to the tensions secured on the back of the arm, while the tension release on the top of the arm leads the middle threads to the tensions 127.

A rod.151, (see Fig. 2), connected with a floor treadle, (not shown), and is also coupled to a rod at 152 by a coupling 153,

and this rod 152 is pivotally connected as at 156 to the lever 1-15, which is pivotally secured, as at 157, to the machine arm. The end' 158 of this lever carries a hookshaped wire 159 secured to and extending up from the prcsser-bar clamp 160, (see Figs. 2 and 9). This clamp 160 is secured to the presser-bar 161. By this means, when the treadle is operated the lever 136 with the arms 135 and-138 will be shifted so as to cause the arms or projections 146 to enter between the tension disks 147 and the arms 130 to enter between the disks 127 and thus release the needles and looper threads,

When the pressure is removed from the floor.trcadle the spring 163, (see Fig. 2), or the rod 151 will return the mechanism to 'which post is provided with threadeyes,

and thence down under a wire guide 166,

tion of the coupling or the collar. The usual hand lifter 16-1 is also'provided for the presser-foot.

The loopcr threads" 1 1-9 pass through a post 165 on the upright arm of the head,

(see Fig. 2), which leads the threads under the twing plate 167. This plate, (see Figs. 2 and 5) is provided with a series of cut out portions 168, 169 and 170, so that when the same is in its closed position the thread pullofi' linger 171 will operate in the recess portion 168 while the thread nipper 172 will operate in the recess 1G9 and the thread take'up linger 173 will operate in the recess 170. It will thus be seen by an inspection,

of Fig. 2, that no matter what vibration or throw the thread may have durlng the rapid running of the machine it will be impossible for 1t to ump over said manipulators or and having a head and a curved apron, a

become out of working position.

U-shaped thread eyelet guides, 17 4 and 175, (see Fig. 5),are provided to guide the threads from one device to the other. The nipper rocker 176 carries a nipper plate 177. An eccentric 178 is secured to the main shaft 50 for actuating the connection 180 which extends outward and terminates in a bearing 181, which is pivotally connected to a crank 182 by means of a tapered stud 183. This crank is secured to the shaft 18 1, thereby giving a rocking motion to the same, and tliis-shaft-extends through the hub of the nipper rocker and has its bearing in the block 185, and on one end of this shaftis the finger 171 while on the other end is the finger 17 $0 that each of said fingers gets its motion from the eccentric 178 through the connection 180. secured to the main shaft 50 and cooperates with the forked arms 190 of the nipper rocker 176 to give a rocking motion to the nipper plate 177 for the purpose of clamping the'threads while the fingers 171 and 173 are acting thereon. v

The swing plate 167 has its projection 191' pivoted to the bracket 185, as at 192, by means of a short shaft 193 held in said bracket. A projection 194' carries one end of a helical spring 196, (see Fig. 6), its op posite end being connected to a front part of the sewing machine head, and this spring keeps the swing cover in a closed or open position when the cover is swung above or A nipper cam 188 isbelow the center of the shaft 193. In other words, as the cover is manipulated one way or the otherit will remain in such position until again shifted by hand. This thus provides a very convenient'means of threading the machine, oiling or adjusting the parts, and overcomes any possibility of the goods passing over the work plate interfering with the threads. 8

The cloth plate 198, (see Figs. 1 and 2)., is secured to the front bearing 3. This plate is comparatively short for a long arm machine and terminates at 199, where it is secured by one or more screws (not shown) to an extension or apron 290 of the overhang ing arm. This extension 200 has a gradual curve 201 for the purpose of givmg a curl to the work if it be longer than the "space.

from the needles tothe wall 202 of the arm, and provides a very rigid support for the cloth plate and at the same time fits closely to and acts as a cover for the receptacle 63, as it rests on the edges of the wall 6 1. shown in dotted lines in Fig. 3, and the swing plate 167 covering the take-up mechanism is also shown in said Fig. 3 in an open position. i i

I claim as my invention:

1. A' sewing machine comprising a base, a long overhanging arm connected thereto The-outline of the cloth plate 198 is cloth plate partly supported by said apron,

said apron, said swinging cover having a plurality of cut out portions on its under slde.

2. A sewing machine comprising a base,

. a long overhanging arm connected thereto and having a head and a curved apron, a cloth plate partly supported by said apron, a pair of oil receptacles in said base, a' removable oil drawer in one of said receptacles, a swinging cover at one side of said apron, said swinging cover having a plurality of cut out portions on its underside, and a spring for holding said swinging cover in its closed or open'position- 3. A. sewingmachine comprising a base, a pair of oil receptacles in said base, a long overhanging arm supported by the base to close one of said oil receptacles, said arm having an'extension or apron for closing the other receptacle, and a removable oil drawer in one. of said receptacles.

4. in a sewing machine, the combination of a base having at one end a housing, an oil receptacle therein, an overhanging. arm

respectively, and one or more rods connect supported on the'edges of and by the wall thereby,

oil from the crank portion of one s a the crankr'portion of the other shaft. 5

tively,

of a base, Lan

ing said crank shafts and also located within said arm.

5. In a sewing machine, the combination of a'base having at one end a housing, an oil receptacle. therein, an overhanging arm supported on the edges of and by the wall of said housing, a crank-shaft in said'base, a crank shaft in said arm, the cranks of both shafts being within the arm and base respectively, and one or more hollow rods connecting said crank shafts andalso located within said arm. I j a 6.: In fa sewing machine, ,the combination of abase, an overhanging arm supported thereby, a crank shaft in said base, a crank shaft in said arm, and one or more hollow rods connecting said crank shafts, having an oil receptacle in which the crank portion of the lower shaft operates. 7. In a sewing machine, the combination of a base having at one'end a housing, an oil receptacle therein, supported on the edges of and by thewall of said housing, a crank shaft in said base,

a crank shaft in said arm, the cranks of said shafts being within the arm and base respecand a series ofthree rods connecting said shafts and also located within said arm..

8. In a sewing machine, the combination of aqbase, an overhanging arm supported a crank shaft in said base, a crank shaft in said arm, a series of three-rods connecting said shafts, the cranks of one shaft having the same throw as the cranks of the othersha'ft, and means for supplying t to 9. In a 'sewiiigrhachine, the combination erhan'ging arm supported thereby, a crankshaft in said base, a crank shaft in said arm, a plurality of hollow rods connectin said crank shafts, and means carried by t e base, fory'supplying oilto the" crank portion of the-lower shaft and the crank portion of the upper shaft.

10. In a sewing machine, the combination of a base, an overhanging arm supported thereby, shaft in said arm, a plurality of hollow rods connecting said crank .shafts, means carried by the base for supplying oil to the crank portion of the lower "shaft and the crank portion of the upper shaft, and wicks carried by portions of said crank rods.

11. In a sewinganachine, the combination of a base, an overhanging arm carried thereby, a crank shaft in said base, a crank shaft in said arm, crank rod connecting means between said shafts, looper mechanism having one or more loopers movable in transverse directions, a. cam actuated slide connected with the base crank shaft, and a rod pivotally connected with said slide and extending in the same direction as the direction of said base 1 an overhangmg arm a crank shaft in said base, a crankmovement of the slide and connected with the looper mechanism for operating 1t.

- 12. In a sewing machine, the combination of a base having at one end a housing, oil snppty means therein, an overhanging arm carried onthe edges of and by the wall of said housing, a crank shaft in saidbase adjacent. a crank shaftm' said shafts being loto said oi1- supply means, said arm, the cranks of cated within the arm and base i'espectively,

crank rod connecting means betweensaid' nismand also located adjacent to said 611 supply means.

13. Ina sewing machine, the combination of a base having oil supply means therein, an: overhanging arm carried by said base, as

one 'or more loopcrank shaftin said base, a crank shaft in.

said arm, crank rod connecting means between said shafts, looper mechanism having .oneor more loopcrs, and means located adjacentto said oil supply means and actuated by said base, crank shaft for operating said looper mechanism and including a cam carried'by said shaft and a slide actuated by said cam.

14. In a sewing machine, the combination of a base, an overhanging arm carried thereby, a crank shaft in said base, a crank shaft in said arm, crank rod connecting means between saidrshafts, an oil reservoir for the crank portion of the base shaft, looper mechanism,

base shaft, and anoil reservoir for said 3 means.

'15. In a sewing machine, thecombination of a base, an overhanging arm carried thereby, a crank shaft in said base, a crank shaft in said arm, crank rod connecting means be-.

tween said shafts, an oil reservoir for the crank portion of'the base shaft, looper mechanism, means for actuating said looper mechanism including means carried by the base shaft, andan oil reservoir for said means, said overhanging arm having a part closing both of said oil reservoirs.

16. In a sewing machine, the combination of a base having at one end a housing, an oil supply means therein, an overhanging arm means for actuating said looper mechanism Including means carried by the being located Wholly Within thearm and base respectively, a plurality of rods connecting said shafts and being located Wholly Within the uprightportion of said arm, means for supplying oil, from the crank portion of one shaft to the crank portion of the other shaft, looper mechanism, means connected there- With and With. the base crankshaft for operating said looper mechanism, and means located in said base for supplying oil to. said last means.

18. A sewing machine comprising a base, an overhanging arm connected thereto and having a head anda curved apron, a cloth plate partlysupported by said apron, anda air of oil receptacles in said base one closed by said apron and the other by said arm.

19. A sewing machine comprising a base, an overhanging arm connected thereto and having a head and a curved apron, a cloth platepartly supported by said apron, a pair 21. A sewing machine comprising a-base,j an overhanging arm connected thereto and having a head and a curved apron, an 011 receptacle in said base and covered by said apron, and a swmgmg cover at oneslde of said apron.v

Signed "at Nyack, N. Y. this 23 day of December, 1912. Y JOHNP. WEIS.

Witnesses:

EDWARD L. RUSS LL, JOHN W; Kenn, 

